Research

The dynamics of electrons in molecules take place on time scales of femtoseconds (1 fs = 10^-15 s) to attoseconds (1 as = 10^-18 s). Our group develops experimental techniques based on high-order harmonic generation to access these time scales, measure and control the coupled electronic and nuclear dynamics.

On one hand, we use high-harmonic generation in molecules as an extremely accurate self-probing scheme to resolve molecular dynamics on sub-femtosecond time scales. Recently, we have demonstrated the measurement and control of attosecond charge migration in oriented molecules through high-harmonic spectroscopy.

On the other hand, we use high-harmonic generation as a light source to generate attosecond pulses and pulse trains, which are applied in time-resolved measurements. The applications include attosecond spectroscopy and time-resolved photoelectron spectroscopy. Recently, we have demonstrated the extension of attosecond spectroscopy to the liquid phase and are actively pursuing this research direction.